c++中udp通讯的方式是甚么
在C++中进行UDP通讯的方式主要有两种:
示例代码以下:
#include <iostream>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
int main() {
int socket_fd;
struct sockaddr_in server_addr, client_addr;
char buffer[1024];
// 创建UDP套接字
socket_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (socket_fd < 0) {
std::cerr << "Failed to create socket" << std::endl;
return ⑴;
}
// 绑定本地IP地址和端口号
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = INADDR_ANY;
server_addr.sin_port = htons(12345);
if (bind(socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0) {
std::cerr << "Failed to bind socket" << std::endl;
return ⑴;
}
// 接收数据包
socklen_t client_addr_len = sizeof(client_addr);
ssize_t recv_len = recvfrom(socket_fd, buffer, sizeof(buffer), 0, (struct sockaddr*)&client_addr, &client_addr_len);
if (recv_len < 0) {
std::cerr << "Failed to receive data" << std::endl;
return ⑴;
}
buffer[recv_len] = '